My Last Humble Request Forex Trading

My final humble request to code this sample :
BUY CANDLE :
- If a candle OPENS BELOW OR EQUAL to PREVIOUS candle low and CLOSES EQUAL OR BELOW the earlier candle CLOSE.
- Then Alert with a pop up message
SELL CANDLE :
- If a candle OPENS ABOVE OR EQUAL to PREVIOUS candle Excessive and CLOSES EQUAL OR ABOVE earlier candle CLOSE.
- Then Alert with a pop up message
The sample on the chart :
Earlier candle Excessive : 0.74781 and shut : 0.74780
Down Arrow Candle open : 0.74781
Down Arrow candle Shut : 0.74782
Situation glad for SELL.
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